Stillwater Mining Company is engaged in the development, extraction, processing, smelting and refining of palladium, platinum and associated metals (platinum group metals or PGMs) produced from a geological formation in south-central Montana known as the J-M Reef and from the recycling of spent catalytic converters. The Company is also engaged in expanding its mining operations on the J-M Reef, and holds the Marathon PGM-copper property adjacent to Lake Superior in northern Ontario, Canada and the Altar copper-gold property in the province of San Juan, Argentina. The J-M Reef is the only known source of PGMs within the United States. The J-M Reef is a narrow mineralized zone containing PGMs, which has been traced over a strike length of approximately 28 miles. In addition to PGMs, the Company's operations produce associated by-product metals including nickel, copper and minor amounts of gold, silver and rhodium.